Adult ADHD & Autism Assessment Services Sussex

Comprehensive Independent Assessment and Diagnosis

Assessment and Diagnosis

We conduct assessment and diagnostic report services for adults over the age of 16 years to identify autism spectrum conditions (ASC), attention deficit disorder (ADD) and attention deficit hyperactivity disorders (ADHD).

What are Autism Spectrum Conditions?


It has been estimated that autism spectrum conditions affect some 500,000 people in the UK.


Autism is a lifelong developmental disability. It is referred to as a spectrum of conditions because symptoms vary from person to person and may be very mild to severe.


These include a range of diagnoses including:

Classic Autism

Asperger Syndrome

Atypical Autism

Pervasive Developmental Disorder (PDD)


For many, the condition is diagnosed in childhood. However, for many people, perhaps those with milder forms of autism, this has not been the case. As the condition has become more well-known and widely discussed, those people may either recognise features of autism in themselves or have family who do so. We now offer adult assessment and diagnosis.

The Assessment Process


During a series of semi-structured interviews, we construct an accurate formulation, examining patterns of behaviour, looking at early life and current behavioural traits.


Using a variety of diagnostic 'tools', checklists and obervations, we conduct a detailed assessment interview. We examine medical and mental health history, looking closely at cognitive and behavioural traits. Taking a careful history of onset and problem identification, we look at the development of motor skills, language patterns, areas of special interest, occupation and skills.


Particular emphasis is placed on social development, patterns of attachment, the development of friendships, self concept, emotional development and mood presentation as well as other important aspects.


Following our comprehensive assessment process, we will provide you with a detailed report and recommendations.

Why is Expert Advice Important?


Failure to recognise adult autism may have had a significant effect on daily function, ability to cope and quality of life. For many people, getting a formal diagnosis represents an important breakthrough in helping to explain why they have had difficulties in certain areas and doing things. It can help employers support employees in the workplace. For some people it can be a really important step in getting the right kind of help.


A definitive diagnosis can clarify that behavioural traits are the result of a pervasive developmental disorder (PDD), not a mental illness or a personality disorder.


Making connections between behaviours and the cause of those behaviours creates understanding, enabling an individual to gain insight into their difficulties and find ways to manage them more effectively. Recommedations may be given for that individual to access appropriate support and therapy. Expert diagnosis insures that expectations can be realistically structured and practical plans tailored for the future.


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